Alignn

- New default ALIGNN-FF model added

- Added LMDB feature
- Added distributed data parallel
- New notebooks added

- Added InterMat CBM/VBM models

- Add environment.yml file for conda based GitHub actions

- Removed pytorch-ignite dependency to enable conda-forge build
- Removed accelerate package, instead use torch.DataParallel
- Removed train_folder.py and train_folder_ff.py, instead use train_alignn.py
- Increase coverage by adding a phonon test

- [Use torch deterministic algorithm.](https://github.com/usnistgov/alignn/pull/139#top)